1 files changed, 19 insertions, 0 deletions
diff --git a/377/CH12/EX12.4/12_4.sce b/377/CH12/EX12.4/12_4.sce
new file mode 100644
index 000000000..954a18141
--- /dev/null
+++ b/377/CH12/EX12.4/12_4.sce
@@ -0,0 +1,19 @@
+disp("Ef=(Ec/q)+(K*T/q)*log(Nd/Nc)");
+d=0.026;  //say d=K*T/q
+Nd1=2*10^16;
+Nc=4.45*10^17;
+c1=d*log(Nd1/Nc);  //say c1=(K*T/q)*log(Nd1/Nc)
+printf('\n The value is Ef1 is Ec/q%f V',c1);
+Vbi1=0.8-(-c1);
+printf('\n The value is Vbi1 is %f V',Vbi1);
+e1=13.2*8.854*10^-14;
+b1=sqrt(2*e1*Vbi1/(q*Nd1));
+printf('\n The value is b1 is %f μm',b1*10^4);
+Nd2=2*10^17;
+c2=d*log(Nd2/Nc);  //say c2=(K*T/q)*log(Nd2/Nc)
+printf('\n The value is Ef2 is Ec/q%f V',c2);
+Vbi2=0.8-(-c2);
+printf('\n The value is Vbi2 is %f V',Vbi2);
+e2=12.2*8.854*10^-14;
+b2=sqrt(2*e2*Vbi2/(q*Nd2));
+printf('\n The value is b2 is %f μm',b2*10^4);
+\ No newline at end of file